It is possible to make a xenon flash lamp operate almost continuously. A strobe light can be adjusted to flash so fast that your eyes cannot distinguish one flash from the next.

However, it is not necessarily practical for you to make a truly continuous light. The bulbs require an enormous operating voltage. How slow a flash is acceptable? What kinds of power source do you have available?

I go with Lemonie; I don't think it's possible. The best I can see achieving would be to turn it into a strobe light, and I think you could only do that by completely replacing the charging/firing circuit and providing a larger power source.